Lock



BARTHOLOMEW F. MCCARTHY, 0F BROOKLYN, NEW YORK.

LOCK.

Specification of Letters Patent.

Patented Apr. 12, 1921.

Application filed January 10, 1920. Serial No. 350,506.

To all whom it may concern:

Be it known that I, BAR'rHoLoMnW F. Mo- CARTHY, a citizen of the UnitedStates, and a resident of the city of New York, borough of Brooklyn, inthe county of Kings and State of New York, have invented a new andImproved Look, of which the following is a full, clear, and exactdescription.

The present invention relates to new and useful improvements in locks,and it pertains more particularly to looks of the permutation type.

It is the primary object of the present invention to provide a mechanismwhich is capable of being attached to the knob spindle of an ordinarydoor latch'in such a manner that operation of the knob spindle isprevented until the various mechanisms of the device have been set.

It is another object of the invention to provide means for individuallysetting the mechanisms to permit of an operation of the locking device.

It is a furtherobject of the invention to so construct the mechanismthat the combination may be changed from time to time at the will of theoperator.

It is a still further object of the invention to provide means wherebythe controlling elements of the locking mechanism are from time to timemoved in such a manner that the combination is disturbed or completelybroken up.

With the above'and other objects in View,

reference is had to the accompanying drawings in which- Figure l is apartial sectional view of a device constructed in accordance with thepresent invention; I

Fig. 2 is a longitudinal sectional 'view taken on the line 2- 2 of Fig.1

Fig. 3 is a similar view taken on the-line 3 -3 of, Fig. 1; I

Fig. 4 is a transverse sectional view taken on the line 44 of Fig. 1;

Fig. 5 is a transverse sectional view taken on the line 5 5 of Fig. '1;

Fig. 6 is fragmentaryview, of the lookingimechanism in a positionopposite to the position in which it is shown in Fig. 1;

Fig. 7 is a vertical sectional view .of a door and door knob spindle;

Fig. 8 is a transverse sectional view on the line 88 of Fig. 7, and

Fig. 9 is a disassembled view of the construction shown in Figs. 7 and8.

Referring more particularly to the drawings, the device comprises acasing or housing 10, one side of which is open, said housmg or casing10 being adapted to be secured in place with its open side adjacent theside of the dOOr by means of screws, bolts, or the like 11. This casingor housing 10 is adapted to be so positioned on the door as to receivethe door knob spindle 12, which passes through the bearing member 13mounted in an opening 14 in the casing or housing 10. Secured to thisdoor knob spindle 12 in such a manner as to rotate therewith, is a cammember 14, and said cam member 14 is pro 'vided on one of its sides witha cam shoulder 15, the other side of the cam member 14 being curved asdesignated by the reference character 16, in such a manner that as thecam member 14 is rotated, the curved edge 16 thereof will rotate in thearc .of a circ e corresp nd g to the rotation ofthe door knob spindle12.

Cast integral with the inner face of the housing or casing 10 andarranged in pairs, are lugs 17 and as best seen in Fig. 2, each of theselugs 17 is provided with a reduced portion 18. The housing or casino; 10is further provided on its inner face with a plurality of integral lugs19, there being preferably two, and said lugs 19 are centrally disposedwith respect to the side walls of said housing. Mounted on the reducedportions. 18 of the lugs 17 are disks 20, and said disks 20 have aportion of their peripheral edge provided with notches or teeth 21. Eachof thesedisks 20 is provided with a notch 22, and between the notch 22and the teeth 21, is arranged a series of perforations 23, the purposeof which will be hereinafter referred to. Each of the lugs 17 isprovided with an interiorly screw-threaded recess 24, and adapted tohave threaded engagement with said recess 24, is a screw bolt 25." Thescrew bolts'25 form the means by which the disks 20 are secured in placeon their respective lugs 17, as best shown in Fig. 2. The perforations23 heretofore mentioned as in the disks 20 are adapted toreceive. apinor the like 26, and said pin is capable of adjustment around the disks20 dependent upon the perforation in which it is placed. Secured to theopposite sides of the housing or casinglO are sheet metal guides. 30,and said guides 30 are. so bent as to form receptacles 31 for coilsprings 32.

Passing through the side walls of the housing or casing 10, adjacent thereceptacles 31, are openings in which are mounted plungers 33, saidplungers each having a reduced end 34, to which is pivoted, as at 35, adog or pawl 36. Secured to the inner face of the housing or casing 10,adjacent these plungers 33, are pins or stops 37, and said pins or stops37 serve the purpose of supporting the pivoted dogs or pawls 36 out ofthe path of the teeth 21, when the plungers are extended under theaction of the coil springs 32.

Slidably mounted within the housing or casing 10 and provided withelongated slots which receive the integral lu s 19, is a sliding member40, and as best s own in Fig. 1 this sliding member 40 is provided withlaterally extending arms 41, said arms 41 being arranged in pairs.Rigidly carried by each of the arms 41, and projecting upwardlytherefrom is a pin or similar projection 42, and said pin or projection42 is so arranged with respect to its respective arm 41 that when thedisks are properly positioned, the notches 22 thereof will be in thepath of travel of these projections 42.

Each of the lugs 19 has a reduced portion, asindicated by the referencecharacter 45, and slidably mounted on the reduced portion 45, is alongitudinally extending member 46, said longitudinally extending member46 being provided with elongated slots 47, which receive the reducedportions 45 of the lugs 19. Screws or screw bolts 48 are employed toretain this member 46 in position on the lugs. The member 46 is providedwith lateral extensions 49, which are rigidly secured thereto and are ofsufficient length to engage the pins 26 carried by-the disks 2Oheretofore mentioned.

Pivotally secured as at 50, to the cam member 14, is a link 51, and saidlink 51 is provided with an elongated slot 52, which. is adapted toreceive the stud 53 carried on the end of the member 46, as more clearlyshown in Fig. 1. v

So far as described, the operation of the device is as follows:

The combination of the device is determined by the position of the pins26 with their respective disks 20. With the parts in the position shownin Fig. 1, it will be seen that all of the disks 20 are so positionedthat their notches 22 are in the path of travel of the pins 42. Thesedisks have been so positioned by depressing the plungers 33 the requirednumber of times (which number of depressions is predetermined).

If, now, the knob spindle 12 be rotated to the right in Fig. 1, it willbe seen that the cam 15 engaging the end of the sliding member 40, willreciprocate the same, causing the projections 42 to pass into thenotches 22 as shown in Fig. 6. Thisrotation of the knob spindle 12operates the latch of the door and permits the same to open. After thedoor has been opened and is again closed, if the knob spindle 12 berotated in the opposite direction, 2'. 6., to the left in Fig. 1, thelink 51 reciprocates the member 46 on the lugs 19 and its lateralprojections 49 will engage the pins 26 and in its movement will rotatethe disks 20 about their pivotal points sufficiently to move the notches22 out of alinement with the projections 42. When the parts are in thisposition, the sliding member 40 is prevented from moving by reason ofits projections 42 engaging the peripheral edge of each of the disks.This movement of the sliding member 40 is permitted by reason of theelongated slot 52 in the link member 51, said slot 52 riding on the studor screw 53.

In order that the door may be opened from the inside, a special knobspindle is employed, as, shown in Figs. 7, 8 and 9. This knob spindle isformed in two parts, one of which is provided with a recess 55, theother part being provided with a reducedend 56, which is adapted to bereceived within the recess. The reduced end 56 is provided with atransversely-extending pin 57, while the socketed portion 55 is cut awayas indicated by the reference character 58 to provide two opposedfingers 59.

By this construction it will be seen that when the member of the knobspindle having the reduced end 56 is turned to the right, the ends ofthe pin 57 will engage the fingers 59, and if the combination beproperly set so that the notches 22 of the disks 20 are positioned inthe path of the projecions 42, the sliding member 40 may be movedlongitudinally of the lock, to permit of the opening of the door. If thecombination be not set, the projections 42v will engage the peripheraledges of the disks 20 to prevent a movement of the sliding member 40 andconsequently the door latch cannot be operated by the spindle.

If, however, that portion of the knob spindle which has the socket 55 beturned to the right in Fig. 8,'it will be apparent that the same is freeto rotate regardless of whether or not the combination is properly set asuflicient distance to permit of an actuation of the door latch to openthe same. If, however, that section of the knob spindle having thereduced end 56 be turned to the left in Fig. 8, it will be seen that thepin 57 will move through a .suflicient space to pre-. vent an operationof the latch of the door.

By means of the foregoing construction, it will be apparent that thedoor latch is free to be operated from the inside, and, at the sametime, is prevented from operation from the outside, or vice versa,depending upon the location of the combination mechanism, it beingunderstood that the door is capable of being opened from the oppositeside to that on which the combination mechanism is secured.

It will therefore be seen that the present invention provides means bywhich the ordinary door latch may be secured against op eration, thusproviding all of the virtues of a positively actuated lock separate andapart therefrom. Furthermore, the present invention provides means bywhich the com bination after having once been set is automaticallydisturbed upon an operation of the door knob on the part of the personclosing the door.

If that portion of the spindle with the socket 55 be turned to the left,the member 46 will be operated and break up the combination. This allowsthe combination to be broken up from the inside of the door. In asimilar manner, the part 56 when the knob is turned to the right, movesthe pin 57 in the slot and breaks up the combination. This is importantin the event the combination has been tampered with.

Claims:

1. In combination with a door knob and its spindle, a permutation lockcomprising a housing, a cam member carried by the door knob spindle andlying within the housing, a plurality of notched disks arranged inpairs, a reciprocating member movable longitudinally of the housing andprovided with arms lying normally between the notched disks, meanscarried by the reciprocating member for engagement with the notcheddisks to prevent movement of the reciprocating member, and means topermit movement of the reciprocating member upon turning of the knobspindle by means of the cam carried thereby.

2. In combination with a door knob and its spindle, a lock, comprising ahousing, a plurality of notched disks carried by the housing andarranged in pairs, a reciprocating member movable longitudinally of thehousing and provided with arms lying normally between the notched disks,means carried by said arms and adapted to pass into the notches of thenotched disks when the latter are in register therewith, means carriedby said housing for individually setting said notched disks, and a cammember carried by the door knob spindle and engaging the reciprocatingmember whereby the reciprocating member is moved upon rotation of theknob spindle when the notches of the disks are positioned opposite thenotch-engaging means of the reciprocating member.

3. In combination with a door knob and its casing, a lock comprising ahousing, a plurality of notched disks in said housing, means carried bysaid housing for individually setting said notched disks to predetermined position, a reciprocating member, a cam carried by the spindleand adapted for engagement with said reciprocating member whereby saidreciprocating member is moved longitudinally of the lock housing, andpins carried by said reciprocating member and adapted to engage thenotches of the notched disk to permit of movement of the reciprocatingmember, said means also serving to prevent movement ofthe reciproeatingmember upon engagement with the peripheral edge of said notched disks.

4. A device of the character described comprising a lock housing, a cammounted in said housing, a reciprocating member mounted for movementlongitudinally of said housing, a plurality of notched disks arranged inpairs, means carried by said housing for individually setting said disksat will, and pins carried by the reciprocating member and adapted forengagement with the peripheral edge of said disks to prevent movement ofsaid reciprocating members operating means.

BARTHOLOMEW F. McGARTHY.

